Anodic Electrodepositing Bioinspired Cu-BDC-NH₂@Graphene Oxide Membrane for Efficient Uranium Extraction

Area of Science:

• Environmental Science
• Materials Science
• Chemistry

Background:

• Heavy metal ion removal, especially uranium, from wastewater is crucial for environmental protection.
• Uranium extraction from complex aquatic environments presents significant challenges due to low concentrations and ion interference.

Purpose of the Study:

• To develop an efficient method for uranium extraction from wastewater.
• To create a novel membrane material mimicking natural uranyl-binding proteins.

Main Methods:

• Anodic electrodeposition of a hierarchical porous 2D metal-organic framework (MOF) Cu-BDC-NH2@graphene oxide (GO) membrane.
• Controlled orientation of MOFs within laminated GO layers to form pillared-layer structures.

Main Results:

• Achieved an unprecedented uranium adsorption capacity of 1078.4 mg/g.
• Demonstrated outstanding selectivity for uranyl ions due to integrated amino and carboxylate groups.
• Successfully mimicked the function of superb-uranyl-binding proteins.

Conclusions:

• The developed 2D MOFs@GO membrane offers a breakthrough in uranium extraction technology.
• This strategy provides a practical and efficient approach for creating orientation-tunable membranes for high-efficiency uranium removal.
• Paves the way for advancements in water purification and sustainable energy.